Patent GB-762995-A (GB)
Title: Soil conditioning agents
Filed: 1954-03-23
Abstract: A composition for conditioning surface soils comprises a mixture of from 5 to 75 per cent, by weight of a material selected from rosin, abietic acid, abietic acid diner, maleic anhydrideabietic acid adduct, or their ammonium, triethanolamine, cyclohexylamine, or alkali or alkaline earth metal salts and 25 to 95 per cent by weight of a copolymer of the formula <FORM:0762995/IV(a)/1> where R is selected from hydrogen an alkyl radicals, R1 is selected from chlorine, hydroxy, phenyl, alkoxy or carboxy, X is selected from -ONa, -OK, -OH, -ONH4, or alkoxy, Y is selected from -OH, -OK, -ONH4, -NH2, or-OCa 1/2 , and n is a number.  The composition may also include other materials such as colloidal clay, bentonite, or aluminium silicate.  Specified copolymers are polymeric vinyl acetate-maleic acid- 1/2 calcium salt, vinyl chloride-diammonium maleate, vinyl acetate-diammonium maleate, vinyl methyl ether-diammonium maleate, vinyl acetate-monosodium maleate, vinyl acetate-monopotassium maleate, vinyl acetate-maleic acid partial methyl ester ammonium salts, vinyl methyl ether-maleic acid 1/2 calcium salt, vinyl alcohol-potassium maleate, and the ammonium salts-half-amides of copolymers of maleic anhydride with methyl vinyl ether or vinyl acetate, or vinyl isobutyl ether or vinyl chloride or vinyl propionate. Preparations of all the above ammonium salthalf amide copolymers are given utilizing the general method of suspending the maleic anhydride copolymer in an inert medium such as benzene and adding to the slurry the desired amount of dry ammonia. Specification 730,463 is referred to.ALSO:Surface soils are conditioned by incorporating into the soil in an amount not exceeding 2 per cent by weight of the dry soil, a composition comprising a mixture of from 5 to 75 per cent by weight of a material selected from rosin, abietic acid, abietic acid dimer, maleic anhydride-abietic acid adduct, or the ammonium, triethanolamine, cyclohexylamine, or alkali or alkaline earth metal salts of these materials, and 25 to 95 per cent by weight of a copolymer of the formula: <FORM:0762995/I/1> where R is selected from hydrogen or alkyl radicals, R, is selected from chlorine, hydroxy, phenyl, alkoxy, or carboxy, X is selected from -OH, -OK, -ONH4, -NH2, or-OCa 1/2 and n is a number.  The composition may also include other materials such as colloidal clay, bentonite, or aluminium silicate. Specified copolymers are vinyl acetate - maleic acid - 1/2 calcium salt, vinyl chloride - diammonium maleate, vinyl acetate - diammonium maleate, vinyl methyl ether - diammonium maleate, vinyl ethyl ether - diammonium maleate, vinyl acetate - monosodium maleate, vinyl acetate - monopotassium maleate, vinyl acetate - maleic acid partial methyl ester ammonium salts, vinyl methyl ether - maleic acid 1/2 calcium salt, vinyl alcohol - potassium maleate, and the ammonium salts - half amides of copolymers of maleic anhydride with methyl vinyl ether or vinyl acetate, or vinyl isobutyl ether or vinyl chloride or vinyl propionate.  The compositions are incorporated in the soil by conventional methods such as discing, harrowing and hoeing. Specification 730,463 is referred to.